28604273 has 4 divisors (see below), whose sum is σ = 28660980. Its totient is φ = 28547568.

The previous prime is 28604269. The next prime is 28604281. The reversal of 28604273 is 37240682.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 9138529 + 19465744 = 3023^2 + 4412^2 .

It is a cyclic number.

It is not a de Polignac number, because 28604273 - 2² = 28604269 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28604263) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27590 + ... + 28607.

It is an arithmetic number, because the mean of its divisors is an integer number (7165245).

Almost surely, 2^28604273 is an apocalyptic number.

It is an amenable number.

28604273 is a deficient number, since it is larger than the sum of its proper divisors (56707).

28604273 is an equidigital number, since it uses as much as digits as its factorization.

28604273 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56706.

The product of its (nonzero) digits is 16128, while the sum is 32.

The square root of 28604273 is about 5348.2962707763. The cubic root of 28604273 is about 305.8278076317.

The spelling of 28604273 in words is "twenty-eight million, six hundred four thousand, two hundred seventy-three".